Repackable adjustable oil filter cartridge



Dec. l2, 1944. c. M. BoLsL-:R

`REPACKABLE ADJUSTABLE OIL FILTER CARTRIDGE Filed Dec. 14, 1940 2Sheets-Sheet 1 ffy? ENEMY Dec. 12, 1944. c. M. BoLsER REPACKABLEADJUSTABLE OIL FVILTER CARTRIDGE Filed Dec. 14, 1940 ,2 Sheets-Sheet 21NVENTOR.

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/7 Cian? W3 www patented1 Dec. 12, 1944 V i REPACKABLE ADJUSTABLE OILFILTER CARTRIDGE Clark M. Bolser, Cedar Rapids, Iowa ApplicatiesDecember 14, i940, serlalNe. 370,096

(ci. 21o- 131) 9 Claims.

l My present invention relatesto an oil lter cartridge wherein thefiltering material is repackable and wherein the cartridge itself isadjustable to llt in different sizes of casings, as for passenger caroperation, small truckoperation and large truck operation, dependingupon thequantity of oil' in the oilsystem of the engine.

One Iobject of. the invention is to provide a means whereby thefiltering material may be removed from a used oil filter cartridge anddiscarded and fresh. material packed into the cartridge in a minimum oftime and with an expense equal only to the cost of the illteringmaterial itself, which may be ordinary waste" of thevariety formed fromcottoniibers and usually used for wiping oil and grease from machinery.

Another object is to provide an oil filter cartridge which consists of apair of filtering material containers each having an open end, whichcontainers telescope together with sufficient telescoplng extent thateach may be partially ruled with' a quantity of filtering material andthe containers thereupon telescoped together for4 enclosing theiiltering material and compacting it to the desired l of oil throughtheperforations of the telescoping Darts of the cartridge.

The foregoing, other and further objects of my present invention will beapparent to those skilled in the art. to'which this inventionappertains, by reference to the following description, accom-l panyingdrawings and appended claims. Embodiments of the invention areillustrated in the accompanying drawings, wherein the views thereof areas follows:

Figure4 1 is a vertical sectional view through an t oilV nlter embodyingmy invention and showing extent afterwhich the cartridge may be readilyplaced in the usual oil filter casing to perform its intended function.t .f

Stiitanother object is to provide a repackable cartridge which may beadjusted to any one oi several sizes by slipping a spring ring into theproper groove of one of the containers so as to limit the telescopingmovement, the containers being subsequently filled with the properamount of filtering materiall to suit the size to which the cartridgehas been adjusted; the cartridge, due toits adjustment, being therebyusable in any one of a plurality of sizes of filter casings.

A further object is to provide a cartridge of the general characterabove described with a self contained sump to catch debris or sludgebefore it passes through the filtering material of the cartridge.

Still further objects are to provide an oil filter wherein a change inthe size oi a lidmay change' thesize of the lter to accommodate adifferent size of filter cartridge; to provide an insert in the form ofan oil distributor where it is desirable to discharge the oil intotheiiltering material at the center of its mass; to provide means forassociating aaasket with a cartridge of the metal container type forreplacement in place of the usual sock type of filter cartridge;` and toprovide a lelescoplcally adjustable, strainer type cil nlter cartridgewherein oil flows from the` outside toward the inside, with means toinsure proper iiow my repackable adjustable oil nlter cartridge therein;

l y Figure 2 isa similar sectional view showing the cartridge adjustedto a diii'erent size and the casingl of the oil filter made: smaller bythe substitution of another size of lid on the casing;

Figure 3 is a sectional view through a modied form of the cartridgeshowing a central oil distributor and the cartridge at maximumadjustment;

Figure 4 is a similar view showing of Figure 3 at minimum adjustment;

Figure 5 is a sectional view through an oil nlter showing a simplifiedtype of my repackable oil filter cartridge omitting the adjustingfeature;

Figure Gis a sectional view through another oil filter of the typeusually receivingk a filter sock as a repackable cartridge, with mycarthe cartridge tridge replacing Vthe sockf type cartridge;

of Figure 8 associated with the lower part before telescoplng the partstogether, and Y Figure 10 is a view similar to Figure 9 showing how thecartridge of Figures 3 and 4 is repacked. On the accompanying drawings,I haveV used' the reference character C to indicate a iilter casing andL a lid therefor in Figure 1. In Figure 2,

the casing C has a lid L of less depth, so that the filter casing issmaller and the'entire fllter there'- for of less capacity than thearrangement shown in Figure 1. The lid L is retained on the casing C bya tie rod I0 having an oil inlet I2 in the lower end thereof andcommunicating withy a bore i8. The upper end of the tie rod is threadedto receive a tubular nut I4 carried by the lid L, whereby the casing andlid are held assembled. A gasket I5 is provided between the casing andthe lid and a gasket I8 is provided between the lid and the head of thetubular nut I4 to prevent leakage. The casing C is provided with an oiloutlet i2a.

The difference of the lid- L' of Figure 2 from the lid L of Figure 1 isthat it is of less depth and the tubular nut Ha need notbe of as greatlength. This arrangement permits the use of one size of casing C anddifferent sizes of lids to provide different sizes of filter casings,thus cutting down the size of the dealer's stock.

On the tie rod I0, I provide my repackable adjustable oil filtercartridge comprisinga lower container l1 and an upper container I8, Thecontainers i1 and I8 are open ended, with their open ends toward eachother when the containers are telescoped together. A quantity oi'filtering material Il is provided in the container I1 and a similarquantity of filtering material is containedin the container Il. Theparting line between these quantities is shown at 2|.

The container I'lhas an inwardly directed bead 22 adjacent its lowerend, on which a perforated partition plate 2l rests. The plate 2lprovides below the bead of filtering material a sludge coilecting space2l.

The containers Hand Il telescoping together as they do may be adjustedfor different quantities of filtering material Il--20. For instance. inFigure l the adjustment is maximum, and in Figure `2 it yis minimum. Tolimit the tclescoping movement, a C shaped ring 2l formed of springsteel wire with its break shown at 25a is movable into any one or aplurality of inwardly directed beads 18. The tllter cartridge may thusbe initiallyadjusted for the proper fsise when iustalled in a givenfilter casing, and thereafter when repacked and the containers l1 and ilare telescoped together to their limit as determined Y by the wire ring2l they will return to that sise.

The type of filter shown in Figures l and 2 permits entryof oil from thebore Il to a settling or sludge space 2l, through a port -11 and througha port 2l in a tube 20 carried by the container i1 at its center. Thetube 2| telescopes over a tube carried at the center of the containerI8, An oil-tight fit between the telescoplng tubes 2O and Iii isprovided by a constriction 3| of the tube Il.

The top of the sludge lspace 2l is defined by a plate Ila havingperforations 2lb therein. The plate 24a is supported on an inwardlydirected bead 24e of the container I1.

The illter cartridge is provided with gaskets 32 and I3 at its lower andupper ends contacting with a collar 34 and a washer Il, respectively.The collar 34 is part of a by-pass iitting which includes a springbiased check valve `VThe intake side of the check valve 3l communicatesthrough a port 31 with an annular groove J8 in the tie rod i0, which inturn communicates through a port I! with the bore I3. The washer 35 iscarried by a wing nut l0 which screws onto the threaded portion of thetie rod lli and slides the collar 34 downwardly against the bias of alspring H under the collar until the coils of the spring are closed.

The arrangement just described permits a visible test to determinewhether a filter cartridge, after it has been repacked, operatesproperly. The nut retains the cartridge in operating position and themotor may be started, whereupon ii' the cartridge performs its illteringoperation properly the oil will bubble up through perforations 42 formedin the top of the container 20 and run down the outside of the cartridgeto be discharged through the outlet Ila. This test may be performedwhile the lid L is removed, and thus the service station attendant mayaccurately determine the workability of the filter before closing thecasing C.

With respect to repacking the filter cartridge, Figure 8 illustrates howthe top container Il may be packed with substantially half of thefiltering material intended to be used for the repacking operation.Figure 9 shows by solid lines how the lower container I1 may besimilarly packed. After the containers I1 and Il have been packed withthe filtering material, the container il is inverted to the dottedposition of Figure 9 with the telescoping parts associated with eachother. The containers may then be forced together to the limit oftelescoping movement as determined by the position of the ring 25,whereupon the filtering material is compacted to the proper degree. Theproper predetermined amount of filtering material of course is initiallyplaced in the containers to secure the proper compaction when thecontainers are telescoped together with substantiaily equal amounts ofthe material in each container.

In Figure 3, I show a filter cartridge having many parts correspondingto the parts already described in connection with Figures l and 2. Suchparts accordingly bear the same reference numerals. The additionalfeature in these two figures is an oil distributor consisting of a tube44 and a pair of discs ll. The discs Ii provide a distributor spacebetween them and have perforations Il to permit discharge of oil in bothupward and downward directions. The tube M has an opening at 41 toaii'ord communication with the space within the tube 4l surrounding thetube 2l. The tube 2i has an opening 4I to communicate oil from the boreIl of the tie rod Ill through the port 2l and into the space between thetube 2l and the smaller tube Il.

The tubel 'Il has a constriction at Il to fit the tube I), and lanother'constriction at l0 to iit the tube I0. This arrangement permitsconsiderable leeway tortelescoping of the tubes Il, Il and Il relativo*to vveach other and yet secure proper oil flow from the port 21 of thetie rod to the per- 'mrauonsu or the'distribuwr discs u. For mstance,maximum adjustment of theoil nlter cartridge is shown in Figure 3 andminimum adjustment in Figure-4, and it is obvious at each adjustmentthat oil now is possible.

yIn each position of adjustment, it is desirable that the distributordiscs I! assume a substantially central position between the upper andlower ends of thecartridge. This is accomplished by placing half of thefiltering material in the container I1, as shown by solid lines inFigure l0, then placing the distributor M-ll in position, and then theupper container Il with its half oi the filtering material in positionasshown by dotted lines. Thereafter, the containers may be telescopedtogether to their limit of telescoping movement as determined by thering 25.

In Figure 5, I have shown a simplified arrangement of my repackable oilfilter cartridge from which the adjustable feature has been omitted. Thecontainer I8 has but a single bead 26 to receive the ring 25 forlimiting the telescoping movement. The oil lter casing is shown at C'and has-'a lid L" I interposed -between the lid and the cartridge. Thecartridge of this ligure does not have the settiing space 24 of Figure 1but has rather a perforated bottom member Ha to receive oil from theinlet I2. The oil passes up through the perforations I2 of the top ofthe cartridge and out through the outlet I2a, as in Figure l.

In someillters, a casing such as C" 6 is provided andis adapted toreceive a sock type of filter cartridge consisting of a filter masscontained in a fabric cover. After a cartridge of this type has beencompressed into position to avoid oil leakage around its periphery andthen used for awhile, it can be removed only by cutting it up anddigging it out oi' the casing. In Figure 6, I show a filter cartridge ofmy repackable type which may be substituted for the sock type cartridge.My cartridge is of the same general construction as described inconnection with Figures 1 and 5, with the addition of a restrictedportion Hb of the container I1 having an inclined shoulder I 1c. Arlnglike gasket l2 surrounds the restriction I'Ib and is adapted to beforced against an inclined shoulder 53 of the casing C" for the purposeof providing a sealing engagement, the gasket being expanded as theiilter cartridge is forced downwardly as by the spring 5l. Thus asealing engagement is provided between my cartridge and the casing C".

In Figure 7, I show my cartridge adapted for that type of filteringoperation wherein the oil flows inwardly from the outer wall of thecartridge toward the center tubes thereof. The containers l1 and i8 andthe tubes 29 and 30 of Figure 1 are modified to the extent that the telescoping outer walls of the containers are perforated as at 53 and 54,and the tubes are perforated as at 55 and 5B. Also, the outer wall ofthe container Il is provided withroutwardiy struck annular beads 51adapted to space the telescoping walls of the containers 'from eachother to permit oil flow between themfrom the openings 53 to theopenings 5|. Two of the instruck beads 26 are provided for adjustment,and the adjusting ring for selective coaction with them is indicated at25 as in Figure 1.

In a nlter cartridge of this type, telescoping the two containerstogether where oil must now through the telescoping walls presents theprob lem of either making an arrangement lor accurately aligning theholes with each other'or permitting oil to now when they are notaligned. The space between the walls provided by the presence of thebeads 51 accomplishes the desired result, while oisetting of theopenings 63 by dii- !erent spacing from that of the beads 51 insuresthat even if one series of the openings are in registry with the beadsy(as the upper series in Figure '7), the remaining openingswill be freefor oil flow. Thus the containers I1 and I8 may be telescoped togetherwithout the necessity of aligning the holes 53 and 54 and in suchmanner.

as to permit the overall height of the cartridge to be increased ordecreased slightly without in teriering with the oil new through theopenings 53 and Si., Sometimes when the cartridge is installed, thelimiting ring 25 might not be moved its full extent, and the possibilityof non-registry of the openings as a result of such a possibility isimmaterial.

'Io insure that ings 55 and 56 of ings oil may now through the openthetubes 29 and Il, the openare made large enough so that in any posi2,864,617 threaded thereon with a spring of Figure tion of telescopingmovement they will be open to each other, as obvious from an inspectionof the drawings.

In order to prevent channeling through the filtering material i9 and 20,after the container i1 has been filled (as in Figure 9), a spring may beplaced thereon which will compress to the position shown in Figure 1when the illtering material containers ,are telescoped together. Thespring 43 tends to keep the filtering material properly compactedinstead of letting it gravitate to the bottom of the filter cartridgeafter some use of the filter. This I have found eifectively prevents theundesirable condition of channeling through the filtering material. Whenthe oil distributor of Figure 3 is used two of the springs 43 areprovided, one placed below the distributor discs and the other abovethem.

It is preferable to provide a bail such as indicated at 58 on theremoval thereof. The ball 58 has terminal ends bent inwardly andpivotally connected in brackets 59 secured to the top of the cartridge.The bail may normally assume a supine position, as shown in Figure 1, oran elevated position, as shown by dotted lines in Figure 2, forconvenience in removalof the cartridge.

From the foregoing description, it is obvious that I have provided anoil filter cartridge which is both adjustable and repackable. Thiseliminates the necessity of carrying several sizes of oil itercartridges in stock and cuts down the expense of replacement to aminimum, inasmuch as the only expense necessary for replacement is thefiltering material itself, which is quite inex pensive. The Job ofrepacking is simplified to a minimum, and by making the containers Iland IB/so that they telescope for a considerable distance, the filteringmaterial may be divided and placed in them and 4then compacted bytelescoping them together, without any possibility of the filteringmaterial squeezing out at undesirable points.

VHaving described certain specific embodiments of my invention togetherwith the operation thereof, I desire it to be understood that theseforms are selected merely for the purpose of facilitating disclosure ofthe invention rather than for the purpose of limiting the number oi.forms which it may assume. It is to be further understood that variousmodifications, adaptations and alterations may be applied to thespecific forms disclosed to meet the requirements of practice without inany manner departing from the spirit and scope of the present inventionexcept as set forth in the claims appended hereto.

I claim as my invention anddesire to secure by Letters Patent of theUnited States:

l. In a repackable oil lter cartridge, a pair of cylindrical filteringmaterial containers each having an open endand a perforate end, saidcontainers each being packed with a quantity of filtering material andbeing variably telescoped together with the open ends oppositelyarranged toward each other, said perforate ends respectively receivingoil before it is ltered by said filtering material and discharging suchoil after it has been nltered thereby, a stop means around one of saidcontainers to limit the telescoping movement of the containers towardeach other, said stop means being adjustable along said one container inthe direction of telescoping movement and means for holding said stopmeans in the position to which it is adjusted when said containers aretelescoped together.

filter cartridge to facilitate of saidl containers 2. In a repackable,adjustable oil filter cartridge, a'pair of filtering material containerseach ,said containers each being packed with a quantity of filteringmaterial and being telescoped together with the open ends toward eachother, adjustable means to limit the telescoping movement thereof, saidadjustable means comprising spaced grooves around a cylindrical wall ofone of said containers, and a spring ring partially received in one ofsaid grooves, said cartridge having oil receiving and dischargingopenings on opposite sides of said filtering material.

3. In a repackable, oil filter cartridge, a pair only of filteringmaterial containers each having an open end, said containers each beingpacked with a separate quantity of filtering material and beingtelescoped together with the open ends toward each other, and a coilspring positioned between said separate quantities of filtering materlalin each container to prevent channeling.

4. In la repackable, adjustable oil filter cartridge, a pair offiltering material containers each having an open end and a closed end,one having a perforate partition spaced from its closed end, saidcontainers each being packed with filtering material, said oontainersbeing adjustably telescoped together, the space in said one of saidcontainers between said partition and said closed end constituting asump therein at one end of the filtering material to receive oil beforeit passes through the filtering material, said containers each having acentral tube with said tubes telescoped together means for deliveringoil to said tubes and from said tubes to said sump, and means to receiveoil from said containers at the other end of said filtering material.

5. In a repackable oil filter cartridge, a pair of filtering materialcontainers each having an open end and a closed end, one of saidcontainers having a perforate partition spaced from its closed end, saidcontainers each being packed with filtering material, said containersbeing freely telescoped together whereby the overall length thereof maybe changed by a change in the degree of telescopic association, andmeans surrounding one container and engageable by the open end of theother one to limit the degree of telescopic movement, said last meansbeing adjustable along said one container in the direction of telescopicmovement, the space in said one of said containers between saidpartition and said closed end constituting a sump therein at one end ofsaid filtering material to receive oil before it passes through thefiltering material.

6. In an oil filter, a casing, a lid therefor, a tie rod for connectingsaid lid to said casing, an oil filter cartridge on said tie rod, a nutfor retaining said oil filter'cartridge thereon, a nut for securing saidlid to said tie rod, said casing having an inlet and an outlet for oil,and said ase-1,617

cartridge comprising a pair of filtering material containers each packedwith a quantity of filtering material, said containers disengageably andadjustably telescoping together, spring ring and groove adjustable meansfor limiting the degree of telescoping of said containers relative toeach other, and means for fixing said adjustable means permanently inone position.

7. In an oil filter, a casing having an inlet and an outlet, a lidtherefor, a tie yrod for holding said lid assembled relative to saidcasing, an oil filter cartridge on said tie rod and having a filter bedtherein, said tie rod having a longitudinal opening communicating withsaid inlet for receiving oil, means for normally affording oommunicationbetween said longitudinal opening and said cartridge on one side of saidfilter bed, and a by-pass for the oil comprising a collar slidable onsaid tie rod, a check valve carried by said collar and openingoutwardly-relative thereto, said longitudinal opening of said tie rodcommunicating with the inner side of said check valve, a spring betweensaid collar and said casing, a nut on said tie rod for compressing saidspring to cause it to hold said collar against said cartridge and meansaffording communication between the other side of said filter bed andsaid outlet and between the outer side of said check valve and saidoutlet.

8. In a repackable oil filter cartridge, a pair of filtering materialcontainers each having an open end and a'closed end, said containerseach being packed with a quantity of filtering material and beingtelescoped together at their open ends, said ends being arranged towardeach other, said containers having central tubes telescoped together,one of said ytubes .having an oil inlet, one of said containers havingan opening in its closed end communicating with said oil inlet toreceive oil therefrom and the other of said containers having an openingin its closed endl to discharge oil after it has been filtered.

9. In an oil filter, a casing having an inlet and an outlet, a lidtherefor, a tie rod for holding said lid assembled relative to saidcasing, an oil filter cartridge on said tie rod and having a filter bedtherein, means for normally affording communication between the interiorof said tie rod and said cartridge on one side of said filter bed andbetween said inlet and the interior of said tie rod a by-pass for theoil comprising a collar slidable on said tie rod, a check valve carriedby said collar and opening outwardly relatively thereto, said interiorof said tie rod communicating with the inner side of said check valve, anut on said tie rod for retaining said cartridge thereon and for holdingsaid cartridge against said collar and means affording communicationbetween the other side of said filter bed and said outlet and betweenthe outer side of said check valve and said outlet.

CLARK M. BOLSER.

CERTIFICATE oF CORRECTION. Y Patent No. 2,56LH617., December 12, 19u14.

CLARK M. BoLsER.

1t is hereby certified that the residence of' the inventor in the abovenumbered patent was erroneously described and specified as "Cedar RapidsIowa" whereas said residence should have been described and specified as--Cedar Falls, Iowa; and that the said Letters Patent should be readwith this correction therein that the same may conform to the record ofthe case in the Patent Office.

Signed and sealed this 15th day of' May, A. D. l9li5.

Leslie Frazer' (Seal) Acting Commissioner of Patents

